Thanks, I think I managed to upload my edits and resolve the conflicts.

Killian Driscoll
Banting Postdoctoral Fellow
Département d'anthropologie
Université de Montréal

umontreal.academia.edu/KillianDriscoll
www.lithicsireland.ie
ca.linkedin.com/in/killiandriscoll

On 19 May 2015 at 08:45, Rory McCann <r...@technomancy.org> wrote:

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> Hi Killian,
>
> This happens when 2 people are editing one object and one person
> uploads first. The second person will get a "conflict"/pre-condition
> failed message like you just did.
>
> You can use JOSM's conflict resolution to solve it. Or throw our your
> work and start again. It's better to do lots of little commits, and
> upload often, to limit the damage this can cause. Redownload (or
> "Update Data" often as well)
>
> This can often happen when adding townlands at the coast. Someone
> could be editing the coastline relation in Cork, while you change it
> in Mayo.
>
> Hope that helps,
>
> Rory
>
> On 19/05/15 00:36, Killian Driscoll wrote:
> > I've just got this error message when trying to update josm edits:
> > The error message is: ResponseCode=412, Error Header=<Precondition
> > failed: Way requires the nodes with id in
> > (28645983,28645984,28645986), which either do not exist, or are not
> > visible.>
> >
> > Any ideas how to fix this?
> >
> > Killian Driscoll Banting Postdoctoral Fellow Département
> > d'anthropologie Université de Montréal
> >
> > umontreal.academia.edu/KillianDriscoll www.lithicsireland.ie
> > ca.linkedin.com/in/killiandriscoll
> > _______________________________________________ Talk-ie mailing
> > list Talk-ie@openstreetmap.org
> > https://lists.openstreetmap.org/listinfo/talk-ie
> >
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